0000000000266671
AUTHOR
J. Lancis
Photonically assisted RF generator with incoherent sources
An RF waveform generator operating with incoherent broadband light is successfully implemented. Complex RF ~10 GHz bandwidth waveforms are generated by means of incoherent wavelength-to-time mapping. Our technique can be scaled to the mm-wave range.
Parallel Phase-Shifting Digital Holography Based on the Fractional Talbot Effect
Digital holography allows us to record and process digitally the complex amplitude distribution associated to diffracted light beams and therefore has offered new possibilities for a variety of applications such as 3D microscopy, interferometry, or information security (see, for example, review [1]). In principle, phase-shifting techniques are the most efficient in terms of spatial resolution to record digital holograms [2]. However, a sequential acquisition of several interference patterns with different phase retardations of the reference beam is necessary, preventing dynamic measurements. Different techniques for time-resolved dynamic interferometry have been developed allowing one-shot …
Imaging at depth in tissue with a single-pixel camera
One challenge that has long held the attention of scientists is that of clearly seeing objects hidden by turbid media, as smoke, fog or biological tissue, which has major implications in fields such as remote sensing or early diagnosis of diseases. Here, we combine structured incoherent illumination and bucket detection for imaging an object completely embedded in a turbid medium. A sequence of low-intensity microstructured light patterns is launched onto the object, whose image is accurately reconstructed through the light fluctuations measured by a single-pixel detector. Our technique is noninvasive, does not require coherent sources, raster scanning nor time-gated detection and benefits …